Rocker arm for internal-combustion engines



Nov.v 2 .1926.

G. B. HARPER ROCKER ARM FOR INTERNAL COMBUSTIQN ENGINES Filed Nov 28 vINVENTOR G0R as IBHMZPLR ATTORNE Y Patented Nov. 2, 1926.

UNITED STATES PATENT OFFICE.

GEORGE B. HARPER, OF TOPEKA, KANSAS.

Application filed November 28, 1924. Serial No. 752,695.

My invention relates to rocker arms for internal combustion engines.

The object of my invention is to provide a rocker arm that is noiselessin its reciprocating motion.

A further object of my invention is to provide a rocker arm that thewear on the pivotal point will be taken up by a spring.

A still further object of my invention is to provide a rocker arm havinga center bearing that will require less oiling than the ordinary arm nowin use.

A still further object of my invention is to provide a rocker arm thatcan be removed without taking down the frame.

Referring to the drawings,

Fig. 1 is a fragmentary side elevation of the mechanism, parts beingremoved for convenience of illustration, Fig. 2 is a cross section Viewtaken on line A, A looking in direction of arrows. Fig. 3 is a top Viewof one of the rocker arms proper. I, is the base on which the frame ismounted and is the means by which the mechanism will be bolted to thetop of the block by means of cap screws 2. 3 is the vertical supportsfor the horizontal bar A, said bar having seats 5 adapted to receive theblade bearing B of rocker arm 6, the said arm being tensioned in saidseat by means of a spring 7 said spring being positioned over a stud 8,and engaging in a seat 9, and the opposite end engaging on the undersideof said rocker arm and held in position therein by a boss 10. The saidspring functions as tensioning means to hold the blade B of said armfirmly seated as heretofore described and the said spring is ofsufficient size so that the reciprocating motion of the rocker arm willnot cause the sides of the spring to contact the said stud 8 which isvertically interposed therein. 11 is the valve stem engaging on the endof said arm, and the opposite end of said arm is adapted to engage onthe end of the cam shaft rod 12. I have provided an aperture 13, asconvenient means for oiling the seat in which said rod is positioned,and like wise an aperture 14, for the rocker arm bearmg.

It will be understood that the mechanism shown and described may be madein one unit and in length to conform to the number of cylinders in theblock, and the height and distribution for the cylinders will be made toconform to the conditions required by the engine on which it is placed.

In the practice of my invention such modifications may be employed aslie within the scope of the appended claims. What I claim as new anddesire to secure by Letters Patent is In rocker arms for internalcombustion engines, a base plate having vertically ex tending arms oneach end thereof, said arms functioning as supports, a bar carried bysaid supports, a plurality of seats distributed along the under side ofsaid bar, rocker arms having knife blade bearings on the upper sidethereof to engage in said seats, bosses on the opposite side of the armsin axial alignment with said bearings, studs and spring seats laterallyextending from the base plate being in axial alignment with the bosses,springs supported in position by the bosses, studs and spring seats, thesaid springs tensioning the rocker arms to engagement in theirrespective seats and adapted to tension equally in axial alignment withthe seat bearings, as shown.

GEORGE B. HARPER.

